Lock



Nov. 17, 1931. I MARKQVICH 1,832,134

LOCK

Filed May 27. 1929 K j w a v 4/ I? 45 4 li I 5. W] NW 9 I m" w." v

i 1 Z 3/ 'v r j INVENTOR E5752 NHRKOV/CH;

ATTORNEY Patented Nov. 17, 1931 UNIT STATE PETER MARKovrcH, or GIGrHARnoR, wnsnme'ron I Loci; 7

Application filed May 27,

This invention relates to locks, and more particularly to permutation locks of that character designedfor use in connection with electrically controlleddevices, or with bolt locks; the principal object of the invention being to provide a lock which may be released only by an exact setting of parts, as determined by adjustment of a pointer, or indicator, to a predetermined numeral onthe lock dial and, if an attempt to open the lock is made without this exact setting, such'as might be done by an unauthorized person, the mechanism is automatically set against any further trial, and can only be released by a person knowing a second predetermined numeral on the dial to which the indicator must be adjusted in order to permit re-setting. Other objects of the invention reside in the details of construction and combination of the various parts and especially in'the novel means provided for resetting the lock after it has been tampered with by an unauthorized person. o

In accomplishing these and otherobjects of the invention, 1 have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein- Figure 1 is a face view of a lock embodying the present invention, a part of the front wallof the lock casing being broken away for better illustration.

Figure2 is a cross sectional view of the I lock, taken on line 2-2 in Figure 1.

Figure 3 is a side view and sectional detail, showing the lock parts during a re-setting operation. 7 I

Figure 4 is a sectional detail of the lock arm.

Figure 5 is a detail of a contact member of an electric circuit connected with and controlled by the lock.

Figure 6 is a sectional detail, showing the alternative use of a bolt in the lock instead of the circuit member. v I

Referring more in detail to the drawings-'- The lock casing 1 is of cylindrical form and is closed by a back wall 2 and a front wall 3; the former, as herein shown, being integral with the casing and the latterbeing fitted 1929. ser ai No. 366,300.

within andsecured to the casing by a plurality of pins, or screws, 4. The front wall 3, preferably, is set back within the casing and has a beveled peripheral surface 5, serving as a dial surface on which a series of numerals are placed for reference in setting and releasing the look. A glass panel 7 overlies the dial and 'endfof the casing, and this is held in place by a flanged collar 8 that'is fixed about the casing and'serves as a means whereby it may be fixed to a supporting panel 9. j

Mounted within the casing, coaxiallythereof, is ashaft 10 which has a reducedinner end portion 10a fixed within an opening 11in the base wall 2. This shaft extends "outwardly through and beyond the wall 3 and the glass panel 7; A sleeve 12 is slidable lengthwise onthe "shaft 10 and has a knurled knob 13 atits outer end, by means of which it may, be rotated, or pulled outwardly 0r pushed inwardly on the shaft. A bushing 15 encloses the outer portion of the sleeve 12 and is revolubly fixed in an'opening in the front wall 3 for rotation withthe sleeve, but this bushing has no adjustment inwardly or outwardly with respect to the casing; it being held in place by ajfiange 15a at its inner end and a nut 15?) threaded thereon, which engages opposite faces of the wall 3. At its outer end,

thebushing carries a-screw 16, see Figure 2, 7

which projects within a slot 17 that isformed lengthwise ofthe sleeve. ;The inward and outward adjustment of the sleeve-for normal operation of the lock is limited by the screw engaging with the. ends of the slot'17, but when the screw is"removed, the sleevemay for re-setting the lock.

Fixed to the bushing er, 18,'the outer end of which terminates closely to the numbered dial surface 5 so that an exact setting of the sleeve 12 and parts conbe adjusted inwardly an additional distance i 15, is a hand, or pointnected therewith may be made for releasing I the lock, and a coiled spring 20 encircles the inner end of the. shaft 10 and this bears against the inner'end of the sleeve 12 to urge the latter outwardly. The shaft 10 has lateral lugs 25 at its outer. end and has a longitudinal slot 26 out in this end which permits the two parts of the divided end of the shaft to be sprung together to enter the outer end of the sleeve as is necessary when the sleeve is to be drawn to its outer limit for setting the lock. l/Vhen the sleeve is adjusted. inwardly to release the lock, these divided portions spring apart and the stops 25 engage over the end of the sleeve, as in Figure 2, to hold it against outward displacement by the pressure of the spring 20.

F ixed within the casing 1, between the endwalls 2 and 3, is a collar 30 havingtwo annular ribs 31 and 32 formed therein. These ribs have inwardly inclined, or beveled surfaces 33 facing the wall 3 and have abrupt, square-cut bottom surfaces 3 1. A; notch 36' is cut through the upper rib for thepassage of a latch bolt, as will presently be described, and "a block 38 i's'fitted beneath the bottom rib and this has an inclined surface 38a continuing from the inclined surface ofthe rib.

.Thisblock, as presently described, is used in the inner'end of the sleeve to urge it outwardly. V l, r

Vhen the present lock is used for controlling an electric circuit, the mechanism, as shown in Figure 2 iszemployed. T his view shows a circuit contact of U-shape, fitted to a:blockl6 of. insulating material and see cured tothe base wall of the housing by means of an insulated screw, or bolt, 48. This contact is directly in radial-alinement with the slot 36 throughthe rib 31. 'One wire 49 of an electric circuit is connected to the bolt 48 andanother wire 50 is connected to'the lockcasing, so that an electrical'connection between the contact'45 and the casing, as provided through'the arm @0, will complete an electric circuit, which maybe used forvarious purposes and in various purposes andin various ways. As is in- .dicated diagrammatically in Figure '2, the circuit wires lead through a source of elec- --tricity51 to a solenoidl52, or other circuit controlled device, which may be operatively connected witha mechanism 53 for actuating'a latch or lock.

1 'When the present mechanism is used with aboltlock, mechanism as disclosed in- Figure 6 is employed and this is substituted for the contact mechanism 15 of Figure 2. In Figure 6,, designates aslidably mounted locking bolt fixed within the casing and adapted :to, be moved inwardly by actuation of abellicrank'62 ,that'is operatively coninoved inwardly to a certain limit.

nectedtherewith. A spring 63, supported by a bracket 64, bears against the bolt to move it outwardly. The bell crank has an upwardly directed arm 62a adapted to be depressed by the latch bolt at the end of the arm 40 to thereby draw the bolt 60 inward- 1y. 7 Ehe bolt 60 in this way could serve as the ordinary bolt as used in a door lock.

For use in re-setting the look after it has been tampered with, there is a locking pawl -7O pivo'tally mounted on the inner end of the arm 40 and this has a hooken end 71 adapted to lock over the pin l2 at the inner end of the latch bolt ll after the latter has been The pawl, also, has an upturned, inner end 72 adapted to be engaged with the front wall of the casing to release the hook from the pin for outward movement of the bolt.

Assuming the device to be so constructed and set as in Figure 2, it is used as follows: Toast the parts in locked position, the operator grasps the knob 13 and draws the sleeve directly outward to its outer limit. This places the arm L0 in the position designated in dotted lines Figure 2. The knob is then rotated so that the sleeve will swing the arm 40 and its bolt 41 to some pcsit-ion out of alinement with respect to the slot 36 sons are to know the exact numeral of the dial to which the pointer 18 must be adjusted in order to bring the latch bolt all at the end of arm 40 into exact registration with the slot 36 so that, on depression or" the sleeve,

the bolt will move downwardly through the 7 slot and into the U-shaped contact to thereby complete the electric circuit for actuating the mechanism associated therewith. If an unauthorized person attempts to release the i lock anddoes not have the exact dial setting required, the bolt 41 will be forced inwardly by passing down the inclined surface of the rib 31 and it will finally snap beneath the rib and will thereby lock so that it cannot to free the sleeve for further downward movement and presses downwardly on the knob 13 so that the bolt 41 which, by this proper-adjustment, hasbeen positioned er;- actly above the block 38, will be moved inwardly by its sliding contact with the block until the-hooked end'oi the pawl locks over the pin 42 ofthe bolt l1. the bolt free of the ribs. The operator then This holds pulls outwardly on theknob, thereby moving'the sleeve 12 outwardly and again raisin the rib 31. Only authorized pering the arm 40 to the upturned position of Figure 2 so that the inner end of the pawl is finally brought against the top, or upper surface, of the casing and the pawl iscaused to be released from the pin 42 and the bolt will be pushed outwardly by its spring 44: to its normal position. The screw 16 is then re-set and the lock is again ready for use. To release the lock bolt 60, as of Figure 6, the arm 40 is adjusted to the proper posi-' tion by reference to the pointer '18, and the sleeve is then depressed so that the arm bolt 41 is brought into contact with the bell crank arm 62a to rock the lever to withdraw the bolt.

I claim:

1. In a device of the character described, a closed housing, a ring fixed within the housing and having an annular shoulder projecting from its inner surface with a slot cut therethrough, a lock operating sleeve mounted in the housing coaxially of the ring and provided with an actuating portion outside of the housing whereby it may be rotated and moved inwardly or outwardly, an arm fixed to the inner end of said sleeve with a yieldable latch bolt at its end normally overlying the shoulder and adapted to snap beneath the shoulder by inward movement of the operating sleeve, except at exact settings, to thereby" render the device inoperative, a marked surface on the outside of the housing, an-indicator movable with the operating sleeve for use in conjunction with the marked surface for locating said latch bolt in registration with said shoulder slot for its passage through the latter and a-lock release element alined with the slot and adapted to be func tionally engaged by the latch boltonly when the latter is moved thereagainst through said slot.

2. In a device of the character described, a closed housing, a ring fixed within the housing and formed about its inner surface with spaced, annular shoulders, the outer shoulder of which has a slot cut therethrough, an element of a lock release mechanism fixed within the housing and within the ring in alinement with said slot, a shaft mounted in the housing coaxially of the ring, a sleeve slidably and rotatably mounted on the shaft, an'arm fixed to the inner end of the sleeve, an in-. wardly yieldable latch bolt slidably mounted in the outer end of the arm, means at the outer end of the sleeve whereby it may be rotated and moved longitudinally of the shaft, yieldable means normally urging the sleeve to its outer limit, a dial marked on the outer face of the lock, a pointer carried by the sleeve for use in conjunction with the dial forpositioning the latch bolt of said arm in alinement with the slot so that inward movement of the sleeve will cause said latch bolt to pass through the slot to engage functionally with the lock release element; said latch bolt being adapted, if not alined with the slot, to be depressed by engagement with the shoulder and to lock beneath the latter. to thereby render the device inoperative.

3. A device of the character described comprising a closed housing, a ring fixed within the housing and formed about its inner surface with a plurality of spaced, annular shoulders, the outer shoulder having a slot cut therethrough, an element of a lock release mechanism fixed within the ring in alinement with said slot, a shaft mounted in the housing coaxially of the ring, a sleeve slidably and rotatably mounted on the shaft and having an actuating portion outside the housing, an arm fixed to the inner end of the sleeve, a yieldable latch bolt mounted at the end of the arm, yieldable means normally urging the sleeve to its outer limit, a dial marked on the outer face of the lock, a pointer carried by the sleeve for use in conjunction with the dial for positioning the latch bolt of said arm in alinement. with the slot for passage through the latter incident to initial inward movement of the sleeve to engage functionally with the lock release element; said latch bolt being adapted, when the sleeve is moved inwardly,

face by means of which said latch bolt will be depressed by a second inward movement of thesleeve, and a pawl carried by the arm for looking. with the latch bolt to retain it in its depressed position for re-setting and releasable by its contact with the housing by return of the sleeve to its normal position.

Signed at Tacoma, Washington, this 19th day of April, 1929. PETER MARKOVTCH. 

